Improvement in gage-cocks for steam-boilers



D. '1. ELLIS.

GAGE-COCKS FOR STEAM-BOILERS.

N0.191,663. Patented June 6.1877.

M By fltz orneys, FDaI/wZTE/ZZA MPETERS, FHOTO UTHUGHAFNEE WASHINGTON 0.C.

UNITED STATES PATENT OFFICE.

DAVID T. ELLIS, OF WARE, MASSACHUSETTS.

IMPROVEMENT IN GAGE-COCKS FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 191,663, dated June 5,1877; application filed May 16, 1877.

To all whom it may concern Be it known that I, DAVID T. ELLIS, of Ware,in the county of Hampshire and State of Massachusetts, have inventedcertain new and useful Improvements in Try-Cocks for Testing theWater-Level in Steam-Boilers, of which the following is a specification:

The objects of my invention are to provide a secure, simple, andinexpensive packing for the cock, which will not readily wear .to an.injurious extent or become inoperative by continuous use; and to theseends my improvements consist in the combination of a tube or nippleadapted to be secured to the boiler, as usual,and a rota-tin g packingmounted or seated in the ordinary arm or lever pivoted to the outer endof the tube, so that it may be swung away from or against the tube toopen or close the outlet therefrom, and be rotated when the cock is openby the steam or water impinging upon its periphery as it escapes fromthe boiler, whereby a new surface is presented to the tube at eachclosing of the cock, and the wear on the packing, produced both bycontact with the tube end and the impact of the steam'and water from theboiler, is distributed throughout the surface or periphery of thepacking and, further, my

improvements consistin the combination of a weighted lever adapted to bepivoted to the boiler tube or nipple, a packing chamberor seat in saidlever, and a circular packing or wheel valve detachably journaled insaid seat, having a yielding surface to abut against the nipple, andfree to revolve upon its axle.

In the accompanying drawings, Figure 1 is a longitudinal section throughmy improved gage-cock; Fig. 2, a like section taken at a right anglewith Fig. l; and Fig. 3, a section similar to Fig. 1 of a portion of acock, with a modified form of valve or packing.

' the inner end of a weighted lever, E, pivoted in the customary mannerto the tube A,

-A deflecting arm or plate, F, upon the tube,

and projecting downward therefrom, prevents the steam and hot water frombeing thrown against the surface of the boiler as it escapes, in suchmanner as to glance therefrom and scald the attendant. A valve orpacking, G, is seated or mounted in the chamber E, so as to be in linewith the nipple-vent when closed, asshown, and so as to be free torotate.

Figs. 1 and 2 show the packing as composed of a hard body or center,such as metal or Wood, with a soft or yielding surface,preferablycomposed of a rubber ring, H, held in a groove in the body.The ring vor periphery portion may, however, be made of compressiblewood, soft metal, &c. A pin, 1, serves to journal the wheel in thechamber, and to admit of its ready removal for repairs or for thesubstitution of a new wheel. The entire wheel might obviously be made ofthe same material. In Fig. 3 a rubber globe or ball valve, looselyplaced in the valve-chamber, forms the packing.

It will be apparent that, upon lifting the weighted lever to test thelevel of the water in the boiler, steam or steam and water will rush outand escape by the nipple, and in so doing will violently impinge uponthe adjacent surface of the packing, and automatically revolve it. Thelifting of the lever changes the relative positions of the axis of thepacking and the discharge-opening in the nipple, thus causing theescaping steam and water to impinge upon the packing in such manner asto insure its rotation and present a new surface to the tube upon thelowering of the lever.

The advantages of my invention are obvious, for it will be seen that thecutting of the packing by the water and steam, which so frequentlyoccurs when the ordinary non-rotating or rigid surfaces are acted uponby the escaping current, is prevented by the yielding or rotation of thepacking. The wear is uniformly distributed over the packing surface, andrepairs can be readily made should any be necessary.

I claim as my invention- 1. The combination, in a try-cock substantiallyas hereinbefore set forth, of the tube or nipple, the chambered leverpivoted thereto, tachably mounted in said chamber, substanand therotating packing, whereby the packtially as and for the purposesspecified.

mg is automatically adjusted to present difierent portions of itssurface to the tube and wear uniformly distributed over the packing.

2. The combination of the weighted lever, constructed as described, withthe packing chamber 01' seat and the packing-wheel de- In testimonywhereof I have hereunto subscribed my name.

DAVID T. ELLIS. Witnesses:

WM. LITTLE, J. C. MYERS.

